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# Copyright (C) 2009-2017 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Handle subscriptions."""
from mailman.config import config
from mailman.database.transaction import flush
from mailman.interfaces.listmanager import ListDeletingEvent
from mailman.interfaces.pending import IPendings
from mailman.interfaces.subscriptions import (
ISubscriptionManager, ISubscriptionService)
from mailman.interfaces.workflows import IWorkflowStateManager
from mailman.workflows.common import (PendableSubscription,
PendableUnsubscription)
from public import public
from zope.component import getUtility
from zope.interface import implementer
@public
@implementer(ISubscriptionManager)
class SubscriptionManager:
def __init__(self, mlist):
self._mlist = mlist
def register(self, subscriber=None, **kwargs):
"""See `ISubscriptionManager`."""
workflow = self._mlist.subscription_policy(self._mlist, subscriber,
**kwargs)
list(workflow)
return workflow.token, workflow.token_owner, workflow.member
def unregister(self, subscriber=None, **kwargs):
workflow = self._mlist.unsubscription_policy(self._mlist, subscriber,
**kwargs)
list(workflow)
return workflow.token, workflow.token_owner, workflow.member
def confirm(self, token):
if token is None:
raise LookupError
pendable = getUtility(IPendings).confirm(token, expunge=False)
if pendable is None:
raise LookupError
workflow_type = pendable.get('type')
if workflow_type in {PendableSubscription.PEND_TYPE,
PendableUnsubscription.PEND_TYPE}:
workflow = (self._mlist.subscription_policy # pragma: nocover
if workflow_type == PendableSubscription.PEND_TYPE
else self._mlist.unsubscription_policy)(self._mlist)
else:
workflow = config.workflows[workflow_type](self._mlist)
workflow.token = token
workflow.restore()
# In order to just run the whole workflow, all we need to do
# is iterate over the workflow object. On calling the __next__
# over the workflow iterator it automatically executes the steps
# that needs to be done.
list(workflow)
return workflow.token, workflow.token_owner, workflow.member
def discard(self, token):
with flush():
getUtility(IPendings).confirm(token)
getUtility(IWorkflowStateManager).discard(token)
@public
def handle_ListDeletingEvent(event):
"""Delete a mailing list's members when the list is being deleted."""
if not isinstance(event, ListDeletingEvent):
return
# Find all the members still associated with the mailing list.
members = getUtility(ISubscriptionService).find_members(
list_id=event.mailing_list.list_id)
for member in members:
member.unsubscribe()
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